CCNA Static Routes: Manual Summarization

Bundle lab · $29.99

Hands-on CCNA static routing and manual summarization lab using a compact HQ–Branch–Remote topology. You will replace three specific static routes to Branch networks with a single /22 summary at HQ, verify end-to-end host reachability, observe the routing table reduction, and prevent over-aggregation loops by adding a Null0 discard route at Branch. A recommended step has you add the same /22 summary at Remote (replacing its default) to practice summarization on both sides.

Learning objectives

• Calculate a correct /22 manual summary for three contiguous /24 networks.
• Replace multiple specific static routes with a single summarizing static route at HQ.
• Verify summarized routing provides reachability for all component subnets from end hosts.
• Observe routing table reduction at HQ after summarization.
• Troubleshoot over-aggregation side effects and prevent loops with a targeted Null0 discard at Branch.
• Optionally practice the same summary at Remote by replacing its default route.

Troubleshooting focus

• Verify every link's interface status and IP addressing (`show ip interface brief`) and correct any interface that is down or misaddressed.
• Confirm each device's running configuration matches the lab objective, and bring any interface, route, or service that is not in its expected state back to health.
• Trace end-to-end reachability with ping/traceroute and isolate the first hop where forwarding fails.